I have 2 Airports attached to iTunes for Remote music playback. They are both still working and under iTunes: Preferences: Devices it says: iTunes is paired with 2 Remotes. However I no longer see the individual volume control sliders window or any way to accesses them. How do you access the individual volume adjustments in iTunes 11?

go to the airplay symbol next to the volume and controls on the top left of iTunes. On the right top of the box you will see it say single or multiple. Choose multiple and you will see the sliders for volume of each.

go to the airplay symbol next to the volume and controls on the top left of iTunes. On the right top of the box you will see it say single or multiple. Choose multiple and you will see the sliders for volume of each.